Ce含量对含硼铈超级奥氏体不锈钢中析出相及耐蚀性的影响

doi:10.13251/j.issn.0254-6051.2025.10.018

摘要/Abstract

摘要： 对比分析了Ce含量(0.002%和0.005%)对含B、Ce超级奥氏体不锈钢时效处理后析出相的析出位置、形态、组成、数量和耐蚀性能的影响。结果表明,Ce可抑制超级奥氏体不锈钢时效过程中析出相的析出,析出相主要于晶界析出,富含Cr和Mo。Ce含量增加,析出相数量明显减少。Ce有利于形成高Mo的析出相,由于高Mo析出相相界面没有明显的贫Cr区,具有很好的抗晶界腐蚀性能。

关键词: 超级奥氏体不锈钢, Ce微合金化, 析出相, 时效处理, 耐蚀性

Abstract: Effect of Ce content (0.002% and 0.005%) on precipitation position, morphology, composition, quantity of precipitated phases and corrosion resistance of super austenitic stainless steel containing B and Ce after aging treatment was compared and analyzed. The results reveal that Ce inhibits the precipitating of precipitated phase during the aging process of the super austenitic stainless steel. The precipitated phase mainly precipitates at grain boundaries which are rich in Cr and Mo. As the Ce content increases, the number of precipitated phases significantly decreases. Ce is conducive to the formation of high Mo precipitation phase. There is no obvious Cr deficient zone at the interface of the high Mo precipitated phase. The interface between the Mo-rich precipitated phase and the matrix has high resistance to intergranular corrosion.

Key words: super austenitic stainless steel, Ce microalloying, precipitated phase, aging treatment, corrosion resistance

中图分类号:

TG174

闫瑞景. Ce含量对含硼铈超级奥氏体不锈钢中析出相及耐蚀性的影响[J]. 金属热处理, 2025, 50(10): 113-118.

Yan Ruijing. Effect of Ce content on precipitated phase and corrosion resistance of super austenitic stainless steel containing B and Ce[J]. Heat Treatment of Metals, 2025, 50(10): 113-118.

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